Lubricant.



oFFioE.

EDWARD GOODRICH ACHESON, 0F NIAGARA. FALLS, NEW YORK.

LUBRIoAiv'r.

966,636, Specification of Letters Patent. No Drawing.

To all whom it may concern:

'Be it known that I, EDWARD GOODRICH AoHEsoN, a citizen of the United States, residing at Niagara Falls, in the county of Y Niagara and State of New York, have 111-.

rented certain new and useful Improvements in Lubricants, of which the following is a specification. 3

In my copending application, Ser. No. 399,486, filed October 28, 1007, I have described and claimed a process of preparin non-aqueous mixtures, and a product thereo said process consisting essentially in defiocculating an amorphous body, such for example as graphite, in presence of Water, and their replacing the water by a nonaqueous medium, as oil. The water may be replaced by oil by a more or less prolonged working of the water-paste with oil as described in my application above refered to; or the wateraste may be mixed with a medium misoi le with both water and oil and the water thereafter separated by drying or otherwise, as described in my copending application, Ser. No. 37 7 ,561, filed June ite and oils of a lighter grade than those The present invention relates to lubricants consisting essentiallyof defiocculated graphwhich possess practical lubricating value.

I have discovered that oils which are deficient in lubricating qualities or even entirely lacking in said qualities, as for example petroleum or kerosene, the lighter mineral oils, or fuel oils, such oils being herein referred to as light hydrocarbon oils, may by admixture of suitable proportions of defloccnlated graphite be transformed into lubricants of very high quality. Such lubricants are not only superior to the best grades of lubricating oils but actually superior to the best grades of lubricating oils containing suspended deflocculated I graphite. For the preparation of this lubricant I may make use of either of the methods above referred to.

Comparative tests of certain lubricating and substantially non-lubricating oils, the

former with and without the deflocculated graphite, yielded the following results:

(1) A test with a high ade of lubricating oil fed at the rate 0 eight drops per raamtea ug. 9, 1910.

' Application filed January 29, 1909. "Serial No. 475,009.

minute to a bearing sustaining 150 pounds pressure per square inch at 445 revolutions per minute showed a coefiici'ent of friction, after constant conditions had been attained, of approximately .017. The oil film broke almost at once upon interruptingthe oil supply.

(2) The same oil fed at the rate of six drops per minute broke immediately.

(3) The same oil with 35% of defiocculated graphite in suspension, fed at therate of eight drops per minute, showed a coefficient of friction of .015. After the interruption of the oil supply the bearing continued to run with low friction for approximately two hours.

1) The sanie oil with 35% of deflocculated graphite in suspension was fed at the rate of-four drops per minute, the conditions being otherwise identical. The coeificient of friction was .0155, and remained low for fifty minutes after interruption of the oil supply.

(5) A fuel oil of gravity 35 13., containing defiocculated graphite in suspension was fed atthe rate of eight drops per'minute under otherwise similar conditions, exhibiting a coefiicient of friction of .010, the'cocflicient of friction remaining low (under .02) for 'forty minutes after interruption of the supply. Y

(6) Kerosene containing deflocculat'ed graphite fed at the rate of eight drops per minute under conditions otherwise identical with the above showed a coefficient of fric- 7 considerable saving in power owing to re-- duced friction. It appears further that the body or viscosity of lubricating oils, to which they owe their value for lubricating purposes, may be to a certain degree detrimental when the oils are mixed with deflocculated graphite, and that a lower coefficient of frlction may be secured by using suspensions of deflocculated graphite in hydrocarbon oils which are lighter than the I claim: a lubricatin grades. This discovery renders A lubricant consisting essentially of de- .available %or lubricating purposes= those oils flocculated graphiteand a light hydrocarbon which have heretofore been of value only, oil.

5 or chiefly for fuel purposes. In testimony whereof, I aflix my signa- 15 The expression light hydrocarbon oil as ture in presence of two witnesses.

used in the claim is intended to designate EDWARD GOODRIGH ACHESON, such products as fuel oils, kerosene, etc., Witnesses: I which do not, for practical purposes, possess ORRIN E. DUNLAP;

10 lubricating qualities. EBEN C. SPEIDEN. 

